Movable form for concrete work



May l2, 1925.

O. H.'ROBERTS MOVABLE FORM FOR CONCRETE WORK File'd. Oct. l, 1924 M@[zzz/autor.

May l2, 1925.

O. H. ROBERTS I MovABLE FORM FOR CONCRETE woRx Filed Oct. 1, 1924 'rsheets-sheet 2 0 ,mima

wmf RNW mm w\ vm Ew wm@ 3% S m w m mm mw; www T T anni 6% mm .w mm \h l1 bw m mw Inventar O. H. ROBERTS v MOVABLE FORM FOR CONCRETE WORK Mayl2, 1925.

Filed 0ct. 1, 1924 7 Sheets-Sheet 5 fnl/antw.

O. H. ROBERTS IOVABLE FORM FOR CONCRETE WORK Filed oct. '1, 1924 'rsheets-sheet 4- //2 //2 l 541mg: Tin 69469', i 55,945 I I ,2i/,f yf; l zI 53/ i I z E z I M i 1li-'ff i gm'. M

Fig-I1.' F5913 F5915' Inventor.

May l2, 1925.

O. H. ROBERTS MOVAB-LE FORM FOR CONCRETE WORK Filed Oct. l, 1924 7SheetsShe-et 5 .In/ventola May '12,. 1925. 1,53 7,882

l o. H.. ROBERTS'l IovABLE 'FORM'FOR CONCRETE WORK Filed Oct. 1, 1924 l4'7 lSheets-Sinaai'. 6

18. Inventor.;

May 12, 1925;

O. H. ROBERTS uovABLE FORM Fon coNcRETE WORK v 7 Sheets-Sheet- 1 FiledOct. 1, 1924 Figure 8 is a transverse section taken on the line 106-106of Figure 6;

Figure 9 is a similar sectional ,view taken on the line 107-107 ofFigure 6;

Figure 10 is la ycorresponding sectional view taken on the line 10S-108of Figure 6;

Figure 11 is a front elevation of a typical corner column form; r i

n Figure 12 is a side elevation of said corner column form; a y

Figure 13 is an elevation of the corner column form when in an opposedor reversed position to that shown in the Figure 11;

Figure 14C is a transverse section taken on the line 112-112 of Figure11;- Y

Figure 15v is a similar view taken line 114-114: of Figure 11;

Figure 16 is a like view taken on the line 118-113 of Figure 11;

Figure 1T is a perspective of one of the interior form units; 'n

Figure 18 is a perspective of an interior form un'it contiguous to aninterior column form;

Figure `19 is a perspective of an interior column form;

Figure 2O is an enlarged fragmentary detail in perspective showing oneform of jack or means for effecting vertical adjustment of the formunits;

Figure 21 is' an enlarged fragmentary detail in section through themeans for effecting vertical adjustment of the form units; and,

Figure 22 is a cross section through a reenforced concrete floor showingthe method practiced in the placing of ytemporary shores, the latterbeing shown in elevation. i

Similar reference characters refer to similar part-s throughout theseveral views of the drawings.

Referring more particularly to the drawings, and especially, to theFigures 1 and 2 thereof wherein plans are shown of a corner bay oftypical concrete building construction, the numerals 17 and 18 generallyindicate the beams of such construction; the numerals 19 and 2O thegird-ers thereof, and, the numerals 13, 111, 15, and 16, the columnsemployed, such showing of the beams, vgirders, and columns being indotted lines. lIn

on the constructing this corner bay, `sections orv units of suitablesize and design, hereinafter termed form units are employed for purposesof convenience and practicability in erection, lowering,disengagementand ino-vviiig in their respective order as included "inthe plastic building process. These forni units, obviously, may be ofdifferent sizes, such as conditions or preference may dictate, regardbeing had in this respect to subscqueiitly presented or encounteredobstructions to their disengagement and removal from a place of work,such as columns, temporary shores, et cetera. In the said Figures `l and2, the various forni units utilized in construction of the corner bayare indicated for purpose of convenience, by the reference numerals 1,2, 3, 4i, 5, 6, 7, 8, 9, 10, 11 and 12, each of said units beingcomplete in itself and capable of individualerection, removal ordisengagement and transportation.

The method by which this particular step ported with respect to thecompleted form` unit construction.. These form supporting joists andstuds are, in turn, rigidly supported upon a frame work 28 provided withrelatively spaced legs or standards 29, which, kin turn, are engaged bysuitable sway-bracing 30, Extension leg sections 32 are provided uponthe lower portions of each of the legs 29, comprising' relatively spacedbars or timbers rigidly inter-connected by transversely ydisposed andspaced tie-niembers 38, such extension leg sections 82 by reason oftheir construction, serving to telescopically receive the lower portionsof their respective legs 29 and to permit of 'vertical adjustment of theforms 25 lcarried upon the frame work l28 thereon.

lVith a view towards providing means for manually effecting verticaladjustment of the various frame works 28 of the form units, jacks 81 areprovided upon each of the extension leg sections 32, details of whichare shown in the Figures 20 and 2l. Each of these jacks 31 comprisetransversely disposed shafts 85 journalled in suitable bearings at theiroppositie ends in hanger brackets 36 secured by bolts or other suitablefastening devices to adjacent parts of the upper portionsA of the legsections 32. A pinion is mounted on each of the shafts 35 andas will benoted, is embraced by the forked end of the jack 31, as is clearlyshownrin said Figures 2O andv21; a pawl 41 being pivotally mounted upona portion of the forked end of the jack 3l, as indicated at 42, andbeing adapted to be normally engaged between the adjacent-teeth of saidpinion 87 through the medium of a coiled spring 18 seated in an adjacentportion of the jack 31. A boss or lug 88 is eX- tended fiom the ack 31and carries thereon a pivotally mounted upwardly disposed Leonesa paivl39, which sitioned as to he arranged adjacent tothe correspondingmarginal portion of the or standard 29 received in this particular legsection 32. Secured to and disposed l0ngitudinally ol.l saidcorresponding marginal i portion ot the lower end the leg 29 is a rackbar 4to, the teeth otf which are adapted to be engaged with the teeth oftheI pinion 37, While the tree end ot the pivotal paivl 39, due to itsdispositioi'i, isadapted to he normally engaged in between certain ofthe teeth ot said raclr'bar d0, as is shown hereable downward movementof the leg 29v4 with respect to the leg section 32 will', of' course, heprevented by vreason of the constant engagement of the pand l39 between.the adjacent teeth of the rack bar 4,0; n

To facilitate rocking of the jack 31, I may and preferably do form an'extension l-il on the outerv end ofthe same whereby a suitable handle 5may be engaged there-y over in order that as much leverage as `isidesired may be obtained.

'Ilo render the form units mobile, that*y is, to vfacilitate theirmovement tromrone place to another', casters or rollers 3ft-aresuitablyl secured and mounted upon the lotven ends of each of the legsections 29; Consequent` upon this arrangement, it is to be appre-Aciated that with lowering ot the formi 251 and their respective frameWorks 28, the casters Se Will loe broughtvinto engagement -with a flooror other supportingsuriiace and will, at that time, serve as anetiectualrmeans tor supporting the tor-m units rather than the extensionleg sections 32.

Guide strips I6 may be and preferably are 'tixedly attached tol certainot the sides ot portions ot the legs 29 and are slidabley inlongitudinally disposed grooves formed in the adjacent sides ot theextension l'egS 32 and serve as` means for preventing said; legs Q9 fromchaiing the tie members 3310i said extension leg sections` A32 as Wellas 'from having undue lateral movement With respect to said extensionlegs- 32.

In the Figures 5, 6 and 7, Iy have shown: an embodiment of anexterior orWall column form, such as is used in forming they columns 14 and 15lreferred to in connection with the Figures'l and 2. In this connection,it should be noted hereatthat onehalt of the column form is firmlyattached to a portion oi the :trame Work 28 o' one :form unit, While theother lia-ll thereotis will be noted, so) po.-

leg 29 upwardly with respect` to the leg section 32, thus etectmgyvertical iiilnly attached to: an adjacent portion ot the i trame Work.2ty ol the adjoining iorin unit, the jointure between the same beingclearly indicated 'at 22` in the Figures 1 and, 2, The upper part of theback 55 oit the column form is secured, as aforesaid, to` a portionofthe 'frame Work 2S. carrying the beaml and girder forms 25, While theupper portionI 5G of said form is connected .to theiront oit the form 25through the medium oi hinges 54:; the front pieces 576 ot' the upperportion. of the column form beingvertically hinged to the portions orsides 56 in a corresponding manner. vThe intermediate or i middleportionof the column form comprises panels 58 which inturn, arevertically hingech as at 5e, to adjacent portions of the tra-me 2S,While side `pieces 59 are provided the same at this point and arehingedly connected in a corresponding manner to adjacent portions ot thepanels 58. An intermediately disposed front Wall consisting ofoppositely disposed panels G0 hinged to adjacent portions of thesides-5`9 is protrided, i

i and thus completes a column form substantially.. rectangular incr-osssection, as is shown in the Figure 8. Other oppositely disposed panels61, 6,2, and 63,. are horizontally hinged adjacent their upper ends toadjacent parts oit the panels 58., 5S), and 60, and as will beunderstood, are swingable in vertical planes away from `each other, the

purpose of which will be subsequently apparent. y, i

To secure the-column forms `in assembled relation .and to prevent*`their spreading or bulging with the pouring oat concrete therein,L avsu-iiicient numberwof clamps, generally indicated herein by the numeral52, are employed, the clamps embracing all sides of the ycolumn form andexerting pressure thereupon sul'licient to-avoid any'undue relativeSmovement or bulging thereof. These clamps, hoWc-ver, do not 'torni anypart ot my invention, and` of course,"may be varied in design orarrangement, as` may he required.

In the Figures 11,12, and 13, I have shown lor purposes ot:illustration, a 4corner columnvr form ior producing the columnsindicated at 153 inthe Figures 1y and 2. These columns eachy comprisesections which are adapted to be connected to, the ferm. units such asindicated by 1- A(Figure 1),` and are completely movable with such formunit. Theymay be stated to.4 comprise iront Walls (it,` which in turnare vertically hinged, as indicatedy at 54, to ther sides 65, the latterbeing attached in a suitable fashion, to the 'front ot the form. 25throughthe medium of' hinges 541. t The construction thus proT duce'drcompletes the upper portion oft the corner column form Whose crosssectional shape or coniiguration is clearly shoivn in the Figure 1,6.The main or intermediate l lll) portion of the corner column formconsists of oppositely arranged sides 67 hingedly connected adjacenttheir upper' ends to adjacent portions of the frame work 28, as clearlyshown in the Figure 11, while front pieces 66 are hingedly connectedalong cer-V tain of their vertical marginal portions, as at 54, toadjacent portions of said sides 67. The corner column form also includesbottom parts or members 69 and 70, whose arrangement is such as 'toprovide a substantially cross-sectionally square form, shown in theFigure 15; these parts 69 and 70 being hingedly connected adjacent theirupper ends to adjacent portions of the front and side pieces 66 and 67.Interior angle pieces 71 are also arrai'igcd adjacent certain portionsof the parts 69 and 70 of the form and are hinged thereto by hinges,generally indicated by the numeral 54.

In order that the corner column forms may be secured in their assembledrelation, clamps, similar to those hereinbefore described, may be used,such clamps einbracing the forms and preventing` spreading or bulging ofthe same with the depositing of concrete therein. f

In the Figures 18 and 19, I have shown the manner in which the forms forproducing an interior column are constructed and attached to theadjacent portions of the frame 28 of the forinunit carrying the same. Inthe Figure 18, the column 1G appears as it would if the form unitnearest the observer had vbeen removed. In this connection, it will benoted that the column form is attached to the contiguous form unitthrough the parts indicated for purpose of convenience by the numerals48 and 49, such parts forming a head or upper part for the column formand which are firmly attached to 'the beam, girder, and slab forms 25and to the frame work 28. The main or intermediate part of the form,indicated herein for convenience, by the numeral'50, is attached at itstop to the part 49 by means of hinges 54while the lower part 51 of theform is attached in a corresponding manner to the adjacent end of thepart 50, that is, through the medium of hinges 54. Clamps are shown inthe Figure 19 as em` bracing the assembled form whereby to prevent i'tsspreading or bulging with the pouring of concrete therein.

It will be noted at this point that one form unit is contiguous to aninterior column, such as indicated by the numeral 12, in the Figure 1,and includes the form for one-fourth of such column.

If desired, the lower portions orv parts of those forms shown as beinghorizontally hinged in the Figures 5, 6, 7, 11, 12, 13, 17 and 18, maybe retained at approximately right angles withrespect to the columnduring lowering of the same and movement asv thereof by means of a cordor chain, as indicated at 53 (Figure 18,), or by other suit' able means.f

To forma chamfer on the upper edge of an exterior beam or girder(Figures 3, 4, 5 and I12), abar 21 is preferably employed,

such bar being adapted to be removed before a form unit is lowered.

The modus operandi of my invention may be stated to be as follows:

The various form units indicated in the Figures 1 and 2 are arranged asshown therein, carrying .with the same properly arrect level or height,whereupon the plasticv concrete is poured into the same, such relativearrangement of the forms 25 and the column forms being clearly shown inthe Figures 3, 4, 18, and 19. After the concrete has sufficiently curedor hardened, the form units are ready for disengagement, and to effectthis, the vertically swinging portions or panels 62, G3, 61, 69 and 70of the various column forms are swung upwardly upon their horizontallypositioned hinges 54, as is indicated in dotted lines by the numeral 69Lin the Figure 11; it being, of course, understood that the clamps 52 forsuch column forms have been previously removed. At this time, the forms25 supported upon the frame works 28 carried on the legs 29 are loweredby means of reverse operation of the'jacks 31 until the casters 34 uponthe various llegs 29 engage or bear upon the ioor or other support forthe form units. The lower or extension legs 32 are now raised until theyclear the iioor or other support whereupon the entire form unit may bethen moved on its casters to another part of the structure or to anotherplace of work and suitably placed and raised for a retin-1ningoperat-ion. v

To completely remove the column forms from the plastic columnsl formedthereby, it is only necessary that the vertically hinged panelsy thereofbe swung outwardly away from their respective columns to positions asindicated in the Figures 8 and 9 by the numerals 59:*--60a and 56th-57a.With such disengagement of thehorizontally swinging and verticallyhinged panels of the different forms, they may be readily removed fromthe partially cured columns without interference. n y

When the formshown in the Figures 18 and19 is removed, the panels orparts 51 are swung in vertical planes to lpositions at substantiallyright angles to the columns, as is indicatedA in the Figure 18. Thepanels or parts 50 may be then swungr horizontally fi O 1, senese awayfrom the partially' `cured columns to the required extent and the entiretorni: unit with the eolnmn torni attacliedsl; may. be low-- eredianda-emoved lier furtlrerf usage, as hereinbeitore stated.

In order thatl tltel difiere-nti formi units shown'L i-nthe `llliguresfli and 2l. maywbe' cena` venientlly removedA 'front a t nedl structurewithout interference and tu ther, to'. permit ot the temporary Sher-inget' the partially curedorI hardenedconcrete"elements, the stell.-lowingi method may be usedhte` advantage;

ltorm unit ll is lirstl lowered andrem" whereupon temporary'l shores ai(All-ignite" are placed undernthe plastic ele;-4 ments"` termed inw:t'hefmanner: shown` in the lligurel. ln; this litigare` 22,; a temporaryslrore 23# is' illustrated, such sliore'beingi pre1 vided with crosstimbers 24k whiiiclrare adaptedy te` have engagement' witlr and:eileetually support the beams 17 et the concrete/ele ments termed. Inthis connection, it is to be noted! that the: eipposiiteliy diisp'osedsupporting legs of the shores are of widths greater than the widths orlengths of the slabs to be supported thereupon, the purpose ot' whichwill be presently apparent.

lVith removal ot the form unit l1, the form units l0, 9, and 12 are thenlowered and removed in the order given, the same being successivelymoved into the space tormerly occupied by the 'form unit 1l and thenmoved outwardly between the opposite sides ot the shores 23a and 23",which, as stated hereinbef'ore, are ot widths greater than the widths orlengths of the slabs and in consequence, greater than the widths orhorizontal dimensions of the form units. Shores Q3, 23, and 23e are thensuitably placed under the formed elements to temporarily support thesame. At this time, the form units 7, S, and G are lowered and removedin the order given; the form unit 7 being removed lirst, whereupon theform units 8 and 6 are removedto the space formerly occupied by the formunit 7, thence between the shores 23d, 23e, 23a and 23h. lith removal ofthese `form units 7, 8 and 6, other temporary shores 232 23g and 23h areproperly placed so as to support the plastic elements during theirperiod ot' linal curing or hardening. Following this, the toi-m unit 3is lowered and removed, and shores 23i and 23j are properly laced tosupport the-plastic elements so termed. At this time, the form units 2,l,v

5 and a are lowered and removed in the order given, whereupon theyk areproperlyy shored and the bay will then be clear oi' i forms,

(Ell

lllhile I have described with some degree tutediu` Forre-Xample, screw:acl;V mayI be substituted! in` lieuet the.` yraclt` andi pinion type otijack herein. shawn: with;V practical and' successful@results.g the`torn'rs'electedf in thiisparticular" embodiment being' for pur.Lpesesvot: illustration.

litalniliestly, the construction. shown is ca.- pable of considerablemodilieatiom, andi. such ineditioation,'asV isl within the scope of myclaims-,s l. consider witltin thespiriti of my inventioniay Leitrim:`

l.. A; plastic', torni; compris-ing support#v ing frameaa. torni oirsaid' trame, means for bra 'ing tliefl'i'ame against swaying' motion,spa-ced*` legs carryingy said. traine,V castersy cured to the lower:ends-I oit said legs,` enten# sion` legs 'slidablv" receiving' portionsot the legs oftV said frametherein, interengageaible means on the;adjacentportions ot said lirst legs and! sai'diexftension: legswheneby'to pre ventl relative lateral movement betweeni the same', ,andad iusting4 means carried on said extension legs engageable withportions of said lirst legs whereby to effect raising and lowering ofthe frame.

2. A plastic form comprising a legged supporting frame, a form removablysup ported thereon, casters secured to the lower ends of the trame legs,extension legs telescopically receiving portions ot said trame legs,rack bars secured to certain sides ot each oit said vhrame legs anddisposed longitudinally of the same, pinions rotatably mounted upon theadjacent side portions of l y Supporting frame, a form on said frame,ex-

tension legs slidably receiving said frame legs, casters secured to thelower ends of the trame legs, means on the extension legs for raisingand lowering the frame, and column forms secured to and carried byportions ot said frame in proximity to portions ol said lirst forms.

4. A plastic `form cominising a legged supporting liframe, a termremovably re` ceived upon said -trame, extension legs telescopicallyreceiving the legs ot ysaid iframe therein, casters secured to the lowerends of the frame legs, means carried on said enH tension legsengageable with portions ot the trame legs Jfor eilecting raising andlower-y lll ing ot said frame, and column forms secured to and carriedupon portions ot said trame' adjacent said first forms. i

5. A plastic column form comprising top, intermediate, and bottom sidewall panels, a

' carrying frame engaged by certain of said top and intermediate sidewall panels, means for hingedly connect-ing the adjacent portions ofsaid top and intermediate side wall panels, and other means for hingedlyconnecting the upper ends of said bottom side wall panels to theadjacent portions of the intermediate side wall panels. i

6. A plastic form comprising a supporting frame, a plurality ofjuxtaposed top, intermediate, and bottom side wall panels, certain ofsaid top and intermediate side wall panels being hingedly connected toportions of said supporting frame, said top and in# termediatel sidewall panels being hingely inter-connected for horizontal swingingmovement, and hinges connecting the upperV supporting frame, a 'formremovably supported upon the upper end of said frame, extension legstelescopically receiving portions of the legs of said frame, casterssecured to the lower ends of the frame legs, means mounted on saidextension legs engageable with portions of said frame legs for effectingraising and lowering'of the frame, and column forms comprising top, intermediate, and bottom side wall panels, certain of said top andintermediate side wall panels being hingedly connected to portions ofthe supporting frame, each of the top and intermediate side wall panelsbeing hingedly inter-connected for horizontal swinging movement, andhinges connecting the upper ends of the bottoni side wall panels to theadjacent lower ends of the intermediate side wall panels.

In witness whereof I have hereunto set my hand.

OWEN HAWORTH ROBERTS.

